Thursday, January 29, 2026

solenoid didn't work like I planned

https://youtu.be/R2kgjilRSOg

Was going to buy a bigger coil (more stroke, larger 4mm hole) but realized the coil is twice the size (almost as big as a real pinball coil) so I cancelled my order.  I'm going to try to make these smaller coils work so I bought some M2 screws and nuts.  I think I just need to mechanically get it to work (smooth rotation, the right torque arm, etc).

Also the flats I ground on the dowel pins were a bit sloppy.  Started out pretty good, the metal started to warm up and make the 3d printed fixture soft, which made the pin turn.  I think I need to try again, and either pause after grinding a single spot, or keep a spray bottle handy to cool it down.




Wednesday, January 28, 2026

HSP parts printed

Parts are coming together.  half scale flipper bats (added a groove where I intend to use an o-ring for flipper rubber).  Screw taps into a flat on the shaft.  There's coil arms above that.  The black piece is a fixture to hold the dowel pin while I manually grind a flat with a bench grinder.  If it works out well, I'll probably just farm it out to an online CNC company but I want to test it out before I commit to ordering a higher quantity of shafts to get a decent price break.  The shaft bushings are 3d printed (fit is good).  One blue coil came today (I ordered a pair, but had to order them separate because amazon does that weird thing where if you order at the same time it gets delayed a week).


I'm 3d printing a chunk of the playfield to test.  I know I could just drill a couple holes in a piece of plywood but I don't have a home depot close by (and I just want to do a quick test).






Tuesday, January 27, 2026

half-scale homebrew

So I'm sure you've seen people build them on youtube.  it's usually some guy in a european country.  There's one channel where the guy is building a bunch of scaled down remakes (whitewater, world cup soccer 94, medievel madness).  You know what sort of sucks about all those projects?  You'll never get to play them, and you'll probably never get to build one yourself.  Think about it, every time you see someone build one, what's missing from you building one too?  The mechs.  Yea, nobody is making half scale mechs, nobody is even sharing their CAD designs.  I've pondered designing one for years, always thinking "man, it's going to be tough to scale everything down".. Everything from mechs, to even the hardware and and thicknesses in general all scaling in half.  This week I've done some designing and now that I'm confident it will work I've bought some parts (small 12v solenoids, buttons, some UHMW for the side rails, some dowel pins for the flipper bat shafts).  I plan to get flippers working, then I've got a design in mind for the slings.  Eventually I'll get to gobble holes, VUKs, pop bumpers but for now I just want to get a game flipping (make sure the solenoids I picked can launch a ball up a playfield and up a ramp).

If it works well, I'd like to share the designs (since EVERYONE seems to have a 3d printer these days).  I think it would be so neat if I kicked off a whole new homebrew genre where people are bringing mini pinball games to shows, maybe even get kids interested in making their own (I think a half scale pinball is far more manageable than a full scale 220lb pinball machine).

Why do I want to start one now?  Well, it's small and light.. it takes up very little space (something I don't have a lot of at the moment).. I could build it, and it could literally get stored in a closet.  I just finished a side project at work for a trade-show display (not pinball related, but still a lot of work building a box with lights and relays and water pumps).  One of our team members jokes about a pinball machine themed around our business for the booth, to which I informed him just how tied I am into pinball.  He's the sort of person that never really follows through on anything (IE likes to spout off ideas, but never wants to execute them).  So I'm just going to build one and surprise him (and my boss).  Building it half scale makes it VERY shippable.  Like no freight for sure, in fact at half scale I may even get it down to carry-on luggage size and weight.

Right now here's a rough layout.  I'm printing flipper parts as we speak, should get my components from Amazon tomorrow then I'm going to try wiring up the flippers and see how it does.





Sunday, January 4, 2026

backup pinball themes

 Had a short tag team with my wife this weekend (we're helping a surgery recovering father get back to being independent which is hampering me getting stuff done).  So last night I decided to just start playing songs from a band I wouldn't mind seeing into a pinball theme someday.  This isn't the first time, last few times I tried to spitball ideas it just sort of fizzled out but this time it just worked.  In fact the more looked at the lyrics and watched the videos more ideas just popped into my head.  What band is it?... Genesis.  Yea, wrap your mind around that one.  Besides being an iconic 80s band, many forget just how much influence Phil Collins had to do with the sound.  If you haven't seen it, watch this Vox video from a few years back:

https://youtu.be/Bxz6jShW-3E

How does that turn into a pinball layout?  Easier than you might think (and re-using several of the targets and bash toy for nearly every song).  Not going to put in any actual work at this point, but going to throw all my notes into a folder for a someday.